Alternative idea for what Slenderman does to his victims.
I dunno....like in medival times burlap or chainmail or something like that?
Except if he can time-travel?
Eh, maybe? I haven't met Slenderman and I hope I NEVER will.
Lucky for you, you probably won't... in this reality.
No, there are other mythical creatures/entities that did that
Also, I never claimed he wore the faces, or cannibalized anyone.
On top of that, Leatherface is based off of someone else.